Oscillator



FIG. 1 is a right side elevational view of an oscillator showing my new design;

FIG. 2 is rear elevational view showing the design for the oscillator of FIG. 1;

FIG. 3 is a left side elevational view showing the design for the oscillator of FIG. 1;

FIG. 4 is a front elevational view showing the design for the oscillator of FIG. 1;

FIG. 5 is a top elevational view showing the design for the oscillator of FIG. 1;

FIG. 6 is a bottom elevational view showing the design for the oscillator of FIG. 1; and,

FIG. 7 is a perspective view showing the design for the oscillator of FIG. 1. 

CLAIM The ornamental design for an oscillator, as shown and described. 